18ct white gold, diamond and emerald 'Cubism Radiant' rings, Canturi, comprising: a ring set to the front with a claw-set square modified brilliant-cut diamond weighing 1.72 carats to an emerald highlighted band partially set with an offset mosaic of baguette and carre-cut diamonds together stated to weigh 1.17 carats, size T, signed Canturi ; two rings each 3/4 set with an offset mosaic of baguette and carre-cut diamonds together stated to weigh 1.46 and 1.32 carats respectively, size T and S respectively, both signed Canturi . (3) Accompanied by: Facsimile GIA report numbered 5131024234, dated 7 February 2011, stating that the 1.72 carat diamond is H colour, VS2 clarity Canturi appraisals numbered BV7704926, BV7709978 and BV7707206, all dated 20 May 2019.
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- Emeralds - Emeralds have been used in jewellery making for thousands of years, and are prized for their deep green colour, which is caused by the presence of chromium and vanadium in the mineral beryl. Because of their rare colour, emeralds are often more valuable than diamonds of a similar size and quality. In jewellery making, emeralds are typically cut into round or oval shapes to maximize their color and clarity. They are often set in gold or platinum and used as the centrepiece of a piece of jewellery, such as a ring or necklace. They can also be used in combination with other gems, such as diamonds, to create intricate and beautiful designs.
- Claw Set Jewellery - The description "claw set" in jewellery refers to a setting where the gemstone is held in place by metal prongs that resemble claws. These prongs are bent over the edges of the gemstone to secure it in the setting. This type of setting is commonly used for diamonds and other precious stones.
- Carat - A carat (abbreviated "ct") is a unit of measurement used to describe the weight of a diamond or other gemstone, and separately is a unit of measurement used to describe the weight of precious metals such as gold,.
For gemstones, one carat is equal to 0.2 grams or 200 milligrams. The weight of a diamond is one of the Four Cs (along with cut, colour, and clarity) that are used to determine a diamond's value.
It is important to note that a diamond's weight does not necessarily correspond to its size. A diamond's cut, which affects how well it reflects light, can make a diamond of a lower weight appear larger than a diamond of a higher weight. Additionally, the carat is not the only factor to determine the value of a diamond, other factors such as clarity, colour and cut are important too.
In the gold industry, the purity of gold is measured in carats (abbreviated "ct"), with 24 karats being pure gold and lower carat numbers indicating a lower purity level. So, for example, 18 carat gold is 18/24 or 75% pure gold, and 12 carat gold is 12/24 or 50% pure gold.
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